The formula of the complex should be determined.
In photometric titration, absorbance of the solution is measured to determine the endpoint of the titration. This is based on the theory that the absorbance of a solution is directly proportional to the concentration of analyte. A graph is plotted between absorbance versus volume of titrant added.
The molar absorptivity of the complex should be determined.
The Beer-Lambert Law is:
A − absorbance
- molar absorptivity
l − length of the solution light passes through (cm)
c − concentration of solution (mol/L)
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